package com.itheima.reggie.service.OrdersService.Impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.IService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.Orders.OrdersMapper;
import com.itheima.reggie.service.AddressBook.AddressBookService;
import com.itheima.reggie.service.OrdersService.OrderDetailSerivce;
import com.itheima.reggie.service.OrdersService.OrdersService;
import com.itheima.reggie.service.ShoppingCart.ShoppingCartService;
import com.itheima.reggie.service.User.Impl.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersImplService extends ServiceImpl<OrdersMapper,Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService service;

    @Autowired
    private UserServiceImpl userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailSerivce orderDetailSerivce;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户id
        Long currentId = BaseContext.getCurrentId();
        // 查询当前的用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> list = service.list(lambdaQueryWrapper);
        if (list == null || list.size() == 0){
            throw new CustomException("购物车为空不能下单");
        }
        // 查询用户数据
        User byId = userService.getById(currentId);
        //查询用户地址
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("用户地址信息有误不能下单");
        }

        long id = IdWorker.getId(); // 订单号

        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetails = list.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        //向订单表插入数据 一条数据
        orders.setId(id);
        orders.setOrderTime (LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(id));
        orders.setUserName(byId.getName ());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ?  "" : addressBook.getProvinceName())
        + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                +(addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName ())
        +(addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);
        //向明细表插入数据 多条数据
        orderDetailSerivce.saveBatch(orderDetails);
        //清空购物车
        service.remove(lambdaQueryWrapper);
    }
}
